This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 16 |
| 6 | 60 |
| 7 | 298 |
| 8 | 1948 |
| 9 | 16460 |
| 10 | 179801 |
| 11 | 2540520 |
| 12 | 46485494 |
| 13 | 1101504593 |
| 14 | 33766488831 |
| 15 | 1336910042036 |
| 16 | 68237302714204 |
| 17 | 4481677081035893 |